论文部分内容阅读
在做拉力试验的伸长率时,首先要作拉力试样的原标距长度(l_0)点,通常是用中心冲头锤击而成,因而所锤击出的原标距长度点常常产生较大的上、下偏差,尤其是在一组拉力试样中常出现不同的偏差。为此,我们设计了双头原标距长度点压印器,(下称压印器)如图1和图2所示。压印力利用普通的硬度计(如HR-150、HB-8000型)试验负荷(100-187.5kgf)而成。经应用证实,压印器压出的原标距长度点公差小,
When doing the tensile test elongation, the first to be the original gauge length (l_0) of the tensile test specimen is usually hammering the center punch, which hammer out the original gauge length points often occur Larger upper and lower deviations, especially in a group of tensile specimens often appear different deviations. To this end, we have designed a double-headed original gauge length point imprinter, (hereinafter referred to as imprinter) as shown in Figure 1 and Figure 2. Imprinting force using a common hardness tester (such as HR-150, HB-8000 type) test load (100-187.5kgf) made. The application confirmed that the original stamping out of the original gauge length of the point of small tolerances,